16669481 has 4 divisors (see below), whose sum is σ = 16731264. Its totient is φ = 16607700.

The previous prime is 16669463. The next prime is 16669483. The reversal of 16669481 is 18496661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18496661 = 127 ⋅145643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16669481 is a prime.

It is a super-2 number, since 2×16669481² = 555743193618722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16669483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30485 + ... + 31026.

It is an arithmetic number, because the mean of its divisors is an integer number (4182816).

Almost surely, 2^16669481 is an apocalyptic number.

It is an amenable number.

16669481 is a deficient number, since it is larger than the sum of its proper divisors (61783).

16669481 is an equidigital number, since it uses as much as digits as its factorization.

16669481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61782.

The product of its digits is 62208, while the sum is 41.

The square root of 16669481 is about 4082.8275741207. The cubic root of 16669481 is about 255.4508543232.

The spelling of 16669481 in words is "sixteen million, six hundred sixty-nine thousand, four hundred eighty-one".